Animal Health Research Institute, Tamsui, Taipei County, Taiwan.
Vet Microbiol. 2010 May 19;142(3-4):225-31. doi: 10.1016/j.vetmic.2009.10.005. Epub 2009 Oct 23.
Bluetongue is an arthropod-borne viral disease affecting domestic and wild ruminants. Taiwan, with the Tropic of Cancer crossing through it, was considered free of bluetongue virus (BTV) before 2001. The goals of this study are to identify the serotype and phylogeny of Taiwan BTV isolates and to understand the serological status and chronology of BTV infection. Analysis of the S10 gene segment revealed that Taiwan BTV isolates are closely related to Chinese strains. Seropositive results were found in 32.7% of the cattle and 8.2% of the goats by head, and 90.7% of the cattle herds and 28.9% of the goat flocks. Anti-BTV antibodies have existed in goat sera since 1989 and in bovine sera since 1993, and over the years, the seropositive rates in rapidly urbanized districts have decreased, most likely due to the loss of vector habitats. Seropositive rates for sheep were variable, due to a small sample size and a small sheep population. Thus far, all natural BTV infections have been subclinical, consistent with experimental sheep inoculation, revealing that the Taiwan isolate is of low virulence.
蓝舌病是一种虫媒病毒病，影响家养和野生反刍动物。台湾地处北回归线穿过，2001 年之前被认为没有蓝舌病病毒（BTV）。本研究的目的是鉴定台湾 BTV 分离株的血清型和系统发育，并了解 BTV 感染的血清学状况和时间进程。S10 基因片段分析表明，台湾 BTV 分离株与中国株密切相关。通过头部检测，牛的血清阳性率为 32.7%，山羊为 8.2%；牛群的血清阳性率为 90.7%，羊群为 28.9%。自 1989 年以来，山羊血清中就存在抗 BTV 抗体，自 1993 年以来，牛血清中也存在抗 BTV 抗体，多年来，快速城市化地区的血清阳性率下降，这很可能是由于媒介栖息地的丧失。绵羊的血清阳性率因样本量小和绵羊数量少而有所不同。到目前为止，所有自然 BTV 感染均为亚临床感染，与绵羊的实验接种结果一致，表明台湾分离株的毒力较低。
